Particulate dialytic silica
CA 1209951 A · Owner: Grace (W.R.) & Co. · Inventors: Winyall, Milton E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Finely divided particulate silica is prepared by the electrodialysis of sodium silicate solution in the presence of silica-containing nucleation particles (seeds). The novel particulate silica product herein, referred to as dialytic silica may be used in the, preparation of catalysts sorbents, abrasives, fillers, and thickeners.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.